Getting a sick chicken in the carrier

I have a really sick chicken that I'm taking to the vet tomorrow, if I can get an appointment. What is the best way to get her into the carrier? Do I just grab her and stuff her in? She'll hate that. I did not raise her from infancy, so she is not used to being handled.

You may want to get her from her roosting place while it is still dark. Or even the night before (like now)--- and put her in the carrier. Chickens will sleep in the dark, so she won't even know exactly the difference between carrier and coop in the dark IMO.

If she struggles, you may want to use a small tea-towel/hand-towel to help wrap her and restrain her if you aren't used to handling chickens. When they are scared and flailing they can scratch pretty well with their toes.

A carrier will be ok but don't just "stuff" her in there. Can you get her tonight when she is less active and gently place her in the carrier tonight? Place a towel over the carrier so not so frighten or alarm her in the morning. Put some water in there with her tonight.